{"id":11877,"date":"2024-03-14T14:54:19","date_gmt":"2024-03-14T14:54:19","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-parser-add_argument-in-python\/"},"modified":"2025-08-04T18:21:19","modified_gmt":"2025-08-04T18:21:19","slug":"how-to-use-parser-add_argument-in-python","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-parser-add_argument-in-python\/","title":{"rendered":"Python argparse: add_argument Complete Guide"},"content":{"rendered":"<p>parser.add_argument is a method in the argparse module used to add command line arguments. Here is a simple example:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> argparse\r\n\r\n<span class=\"hljs-comment\"># \u521b\u5efaArgumentParser\u5bf9\u8c61<\/span>\r\nparser = argparse.ArgumentParser(description=<span class=\"hljs-string\">'Process some integers.'<\/span>)\r\n\r\n<span class=\"hljs-comment\"># \u6dfb\u52a0\u547d\u4ee4\u884c\u53c2\u6570<\/span>\r\nparser.add_argument(<span class=\"hljs-string\">'integers'<\/span>, metavar=<span class=\"hljs-string\">'N'<\/span>, <span class=\"hljs-built_in\">type<\/span>=<span class=\"hljs-built_in\">int<\/span>, nargs=<span class=\"hljs-string\">'+'<\/span>,\r\n                    <span class=\"hljs-built_in\">help<\/span>=<span class=\"hljs-string\">'an integer for the accumulator'<\/span>)\r\n\r\nparser.add_argument(<span class=\"hljs-string\">'--sum'<\/span>, dest=<span class=\"hljs-string\">'accumulate'<\/span>, action=<span class=\"hljs-string\">'store_const'<\/span>,\r\n                    const=<span class=\"hljs-built_in\">sum<\/span>, default=<span class=\"hljs-built_in\">max<\/span>,\r\n                    <span class=\"hljs-built_in\">help<\/span>=<span class=\"hljs-string\">'sum the integers (default: find the max)'<\/span>)\r\n\r\n<span class=\"hljs-comment\"># \u89e3\u6790\u547d\u4ee4\u884c\u53c2\u6570<\/span>\r\nargs = parser.parse_args()\r\n\r\n<span class=\"hljs-comment\"># \u6253\u5370\u7ed3\u679c<\/span>\r\n<span class=\"hljs-built_in\">print<\/span>(args.accumulate(args.integers))\r\n<\/code><\/pre>\n<p>In this example, we created an ArgumentParser object and added two command line arguments using the add_argument method. The first argument accepts one or more integers and is saved in the integers attribute. The second argument is an optional parameter &#8211;sum, which stores the sum function in the accumulate attribute using the store_const action. If this parameter is not provided, the default is to use the max function.<\/p>\n<p>Finally, we use the parse_args method to parse command line arguments and print the results. You can add more command line arguments as needed and handle them as necessary.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>parser.add_argument is a method in the argparse module used to add command line arguments. Here is a simple example: import argparse # \u521b\u5efaArgumentParser\u5bf9\u8c61 parser = argparse.ArgumentParser(description=&#8217;Process some integers.&#8217;) # \u6dfb\u52a0\u547d\u4ee4\u884c\u53c2\u6570 parser.add_argument(&#8216;integers&#8217;, metavar=&#8217;N&#8217;, type=int, nargs=&#8217;+&#8217;, help=&#8217;an integer for the accumulator&#8217;) parser.add_argument(&#8216;&#8211;sum&#8217;, dest=&#8217;accumulate&#8217;, action=&#8217;store_const&#8217;, const=sum, default=max, help=&#8217;sum the integers (default: find the max)&#8217;) # \u89e3\u6790\u547d\u4ee4\u884c\u53c2\u6570 args = [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[12990,317,15451,72,84],"class_list":["post-11877","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-argparse","tag-command-line","tag-parser-add_argument","tag-python","tag-python-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python argparse: add_argument Complete Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to use parser.add_argument in Python&#039;s argparse module. 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